This is located in the frunk and is affixed to what I'd consider to be "the back of the bumper". As you can see, mine is cracked. It was torqued on too tight and over the years has crumbled the plastic mount holes and cracked the sensor casing... revealing what looks like a coil of wire inside. I sealed this back up with shoe goo and reconstructed plastic mounts with new plastic and attached it back how it was. No errors were being thrown.. it just couldn't be good ... seeing a cracked sensor like that. I had to do something before it corroded out in there and did start causing a problem. But what problem would that be?